4 ms·
Correct. Adiabatic cooling due to depressurization causes temporary condensation. Though arguably it's more of a "back" than a "front", since it's in the wake o
by ummonk 6y ago
Correct. Adiabatic cooling due to depressurization causes temporary condensation. Though arguably it's more of a "back" than a "front", since it's in the wake of the pressurization front.
- adolph 6y agoDoes that make it like the vapor cone that appear around aircraft and launch vehicles sometimes? https://en.wikipedia.org/wiki/Vapor_cone https://en.wikipedia.org/wiki/Vapor_cone
- ummonk 6y agoYup, same cause (substantial temperature drop due to adiabatic expansion).
- refurb 6y agoMakes sense. And my understanding of the "condensation wave" is that it's formation and dissipation is highly dependent on local conditions like humidity, temperate, etc. She claims that measuring the speed of that "condensation" wave proves it's not a shockwave, the actual shockwave can move faster than the "condensation wave" (because it's formation and dissipation is highly variable).
- ummonk 6y agoWell it's basically if you normally just raise pressure and lower it then it will propagate at the speed of sound (more or less - the extreme temperature shifts in the wave will cause some variation in the actual speed of sound). High explosives cause air to be blown apart such that you're no longer just talking about a pressure wave, but talking about air flying with momentum faster than the speed of sound in a shockwave (at least until the shockwave loses energy and becomes a pressure wave). I would expect the condensation wave (if one exists, which as you said is more likely during conditions of high relative humidity) to travel in sync with either a pressure wave or a shockwave though.